<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 两个数组的交集 -->
    <script>
      let arr1 = [1, 2, 3, 4, 5]
      let arr2 = [4, 5, 6, 7, 8]
      let beMixed = arr1.filter(item => arr2.indexOf(item) > -1)
      console.log(beMixed)
    </script>
  </body>
</html>
